热电联产机组在平峰转供模式下的经济性分析

Economic analysis on heating supply of cogeneration units with peak-load shifting

根据热电联产机组的供热能力与城市集中供热的发展现状,提出了在当前集中供热方式不能满足热用户需求时,根据供热期环境温度的变化情况,采取热电联产机组平峰运行,集中热源厂调峰运行的模式,解决了供热期热负荷需求不均的问题。从发电量、供热量与节约燃煤的角度分析了平峰转供模式下热电联产机组的经济性,最终得出平峰转供模式在给热电联产机组带来更多经济效益的同时,还能弥补城市供热需求缺口,对缓解供热压力与减少碳排放都具有较大的意义。

In view of the heating supply ability of cogeneration units and the current situation of centralized heating supply,a method while the centralized heating supply system cannot satisfy the users＇ demand,is put forward. According to the change of environment temperature,specific modes that the cogeneration units work in flat periods and central heating resources work in peak periods,are adopted. In such way,the imbalance of heating load in supply period can be well settled. The economic efficiency of cogeneration units with peak-load shifting is analyzed from the perspective of power generation,heating output and coal decrease. Finally it can be found out that the peak-load shifting can not only bring more economic benefits but also recover the heating gap,and it is of a great significance to relieve the pressure on heating supply and reduce the carbon emission as well.